Meet de contades



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M. DE GONTADE'S. SECONDARY BATTERY.

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MFRY DE CONT'ADES, OF PARIS, FRANCE.

SECONDARY BATTERY.

SPECIFICATION forming part of Letters Patent No. 590,930, datedSeptember 28, 1897.. Application filed February 9, 1897. Serial No.622,641. (No model.) Patented in France August 11,1896, No. 258,825.

To aZZ whom it may concern.-

Be it known that I, MERY DE CONTADES, of Paris, in the Republic ofFrance, have invented a new and useful Improvement in SecondaryBatteries, which is fully set forth in the following specification, andwhich has been patented in France, No. 258,825, dated August 11, 1896.

This invention has for its objects to impart to the elements of asecondary battery increased suppleness and elasticity, to obviate thenecessity of great care in handling the battery, to give strength to theplates, and to increase the durability of the-battery. The improvedconstructions whereby these objects are attained are illustrated in theaccompanying drawings, wherein- Figure 1 is a side elevation of abattery constructed in accordance with the invention. Fig. 2 is a planView thereof. Fig. 3 is' an elevation of the casing or envelop of one ofthe elements. Fig. 4 is a horizontal section on line m, Fig. 3; and Fig.5 is a vertical section of the envelop when provided with a singleholding-band.

The accumulator is composed of a number of positive electrodes 0 ofinoxidizable metal in thin sheets (about one millimeter in thickness)folded back and forth, as shownin Figs. 2 and 4, each inclosed in acasing formed of the two parts A B, preferably constructed ashereinafter described, and filled in about the electrode 0 with activematerial 0.

F represents the conducting-strip which electrically connects thepositive elements, and II the corresponding strip connecting thenegative plates 1. The latter may be of the usual construction. Theelements are, as usual, immersed in the acidulated battery liquidcontained in vessel K, which may be of wood or other inoxidizablematerial. A heavy coating of paraffin is preferably spread over thesurface of the liquid to preventevaporation and the escape of vapors.

The casings A B of the positive electrodes are about two centimeters inthickness and are of such size that the angles of the folds of theelectrodes 0 simply touch the interior walls. They may be of rubber orany other suitable well-known material. The form of the electrodes givesthem great suppleness and freedom of movement, enabling them to becomedeformed without detriment, .thus avoiding the danger of breaking theinclosing casing. The negative electrodes I may consist, as alreadystated, of ordinary plates, or they may be formed, as are the positiveelectrodes, of folded sheets contained each in an inclosing andprotecting casing, as shown in Figs. 3 and 4.. The two walls A B, whichform the porous envelop or casing, may be perforated or provided withholes a, which do not quite pass through the walls, but stop within afew millimeters of one surface. The walls A and B are so fashioned attheir meeting edges as to form expansible joints, permitting thespreading or expansion of the casing to accommodate it to changesproduced in the form of the inclosed electrode during the charging anduse of the battery. These joints are shown in Fig. 4, as formed bytenons and mortises, but other equivalent constructions can be employedinstead. By this arrangement increase in porosity of the active materialis obtained andthe charge and discharge are effected with facility andwithout alteration of the plates. At the same time the capacity of theelement is considerably increased.

The casing A B may be surrounded with narrow belts or holding-bands D DD preferably elastic, such as rubber, or of expansible and ductilemetal, such as lead or tin. This allows the battery action to take placewithout rupturing the vessel and serves to maintain the active substanceagainst the plate. There maybe used a single band D, of lead or anyother suitable conducting material, extending the full height of thevessel, as shown in Fig. 5, thus constituting an additional protectiveenvelop or armor. In such case the perforated armor may be united withthe casing A B and be arranged in such a way as to form cells G G whichwhen filled with active material constitute the negative electrode, thepositive electrode 0 being inclosed, as before, in the vessel A B.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-- 1. In a secondary battery, anon-conductin g IO terial surrounding and united to said casing,

and provided exteriorly with cells filled with active material,substantially as described.

In testimony whereof I have signed this specification in the presence oftwo subseribing witnesses.

MERY DE CONTADES.

\Vitnesses:

EDWARD P. MAGLEAN, EDWARD BEUGUIOT.

